Author(s)
Julia M. Borys, BA
Kevin J. Choi, BS
Rahul Varman
Affiliation(s)
Creighton University School of Medicine, Omaha, NE (Choi, Borys, and Varman)
Abstract:
-Background
Ptosis is known to reduce superior visual fields, but its effects on peripheral vision remain poorly characterized. Peripheral vision is essential for activities such as driving and environmental awareness. Standard perimetry (VF24-2 testing), evaluates only the central 24 degrees of vision, leaving the lateral field unassessed. This study models the effect of ptosis on peripheral visual awareness using eyelid weights in healthy volunteers.
-Learning Objectives
1. To quantify peripheral visual field loss resulting from simulated ptosis using eyelid weights.
2. To recognize the potential impact of peripheral visual obstruction on functional activities such as driving.
-Study Objective
To determine the extent of superior and lateral visual field loss caused by simulated ptosis and evaluate its potential functional implications.
-Design Type
Prospective observational study with and without eyelid weighting to simulate ptosis.
-Methods
Healthy adult volunteers underwent baseline eyelid and visual field assessment. MRD1, VF24-2 equivalent testing using the Vivid Vision VR platform, and lateral visual field limits were measured. Lateral field testing was performed by advancing a red flag along a wall perpendicular to the line of sight and 8 feet away until first detection. Each test was repeated after applying a Blinkeez eyelid weight to simulate ptosis. Lateral field loss was calculated using trigonometric relationships between detection distance and wall position. Pre- and post-weight values were compared.
-Results
Preliminary data show measurable peripheral field reduction following induced ptosis, averaging six degrees of lateral loss.
-Conclusion
Induced ptosis produces quantifiable peripheral field loss not captured by standard perimetry, with potential implications for driving safety and functional assessment.